Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1981-05-27
1982-11-09
Prescott, A. C.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 14D, 430399, G03G 1510, B05C 1100
Patent
active
043581960
ABSTRACT:
For the development of charge images on photoelectric carriers, a developer mixture is used which is comprised of carrier particles and toner particles. In order to prevent excessive aging of this developer mixture, the developer station is constantly supplied with fresh developer and used developer is constantly removed in the same quantity. The quantity of the developer which is supplied to or removed from the developer station is determined with the help of dosing devices. These can include a rotary element with a bore hole. The bore hole is filled with developer and, after rotation of the element by 180.degree., it is again emptied. The rotational speed of the rotary element and the size of the bore hole determine the quantity of developer which is supplied to the developer station or, respectively, is removed therefrom.
REFERENCES:
patent: 3331592 (1967-07-01), Cassano et al.
patent: 3991709 (1976-11-01), Sato et al.
patent: 4110029 (1978-08-01), Goshima et al.
patent: 4166702 (1979-09-01), Okamoto et al.
patent: 4168329 (1979-09-01), Miyakawa et al.
patent: 4179210 (1979-12-01), Bestenreiner et al.
Prescott A. C.
Siemens Aktiengesellschaft
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